Well that clears things up
I've actually had it on 'aggressive' settings in the bios, thats at 166mhz, but manually can get it up to 183mhz before crashes and whatnot. I would keep it permanently oc'ed but i cannot play Half-Life 2 singleplayer without 'memory could not be read' errors every 10 minutes or so. Every other intensive test i've tried it worked fine...Thanks anyway